<template>
  <div>
    <!--    面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
<!--    卡片区域-->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="AddGoods">添加商品</el-button>
        </el-col>
      </el-row>
      <!--  商品列表数据表格渲染    -->
      <el-table :data="goodslist" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140px">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="230px">
          <template slot-scope="scope">
            <el-button icon="el-icon-edit" size="mini" type="primary">编辑</el-button>
            <el-button icon="el-icon-delete" size="mini" type="danger" @click="removeById(scope.row.goods_id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>
      <!--  分页    -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[2, 5, 10 ,15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total" background>
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  name: 'list',
  data () {
    return {
      // 1.获取商品列表数据所定义的属性
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      }, // 获取商品数据要查询的对象
      goodslist: [], // 保存商品列表数据的数组
      total: 0 // 保存商品总数的属性值
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    // 1.渲染商品数据的相关操作
    // 1.1根据分页获取对应的商品列表数据的操作
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods',
        { params: this.queryInfo }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      } else {
        this.$message.success('获取商品列表成功')
        // console.log(res.data)
        this.goodslist = res.data.goods
        this.total = res.data.total
      }
    },
    // 1.2当前一页数据条发生变化所触发的方法
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 1.3当前页码值发生改变所触发的方法
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },

    // 2.根据id删除商品数据
    // 2.1 点击删除按钮弹出对话框
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      } else {
        const { data: res } = await this.$http.delete(`goods/${id}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除失败！')
        } else {
          this.$message.success('删除成功！')
          await this.getGoodsList()
        }
      }
    },

    // 3.跳转到添加商品页面的操作
    AddGoods() {
      // 通过编程式导航跳转页面
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style scoped>

</style>
